Help Needed With Non-Starting Berry Flame/Salisbury Turbo 2 Gas Fire

[PaulF]

2nd time lucky with posting this - 1st one disappeared!!
Hi all - can anyone assist with a non starting gas fire?
It's an older Robinson Wiley that only gets turned on 1 or 2 times per year.
Had it working for 7 hours yesterday and today will not fire up.
It's a turbo fan model Berry Flame/Salisbury Turbo 2.
At start up the fan comes on as normal and the piezo works fine after the initial 20/30 seconds start up - but no gas - although the gas feed to the unit is working ok at the stop cock next to unit.
The manual states there is a manual thermostat switch on the unit for overheating reset - does anyone know where this is located?
Assuming the reset does not work whats the next check item - solenois? or?
Any/all help greatly appreciated

[IloatheBG]

Probably too late, but the culprit is probably the APS.

[PaulF]

Thanks for reply. As we did not need the fire during winter was not a drame.
Tested everything else on fire - fairly basic set up - only conclusion I came to was the ECU/Brain/Control unit - it was sparking but solenoid not opening.
Is that what you refer to as the APS?